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24K Labs Crypto Address Validator
x402
24K Labs Crypto Address Validator is a paid API for AI agents from api.24klabs.ai, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-13).
Validates a cryptocurrency address for correctness, checksum validity, and chain type (e.g. EVM)
Price / call$0.003
Success—
StatusUnknown
How this service works
A curated directory of x402 services — each one on the list on purpose, with the health, uptime, and independent trust grades from across the ecosystem gathered in one place.
Output
Returns a JSON object indicating the detected chain (e.g. 'evm'), whether the address is syntactically valid (valid: true/false), and whether the checksum is correct (checksum_valid: true/false).
Example use cases
Pre-transfer address sanity check
“Before I send crypto to 0x742d35Cc6634C0532925a3b844Bc454e4438f44e, can you verify it's a valid EVM address with a correct checksum so I don't lose funds?”
User input validation in a dApp
“A user just typed in the address 0xAbCd1234EfGh5678 in my app's send field — can you check whether it's a properly formatted and checksummed EVM address?”
Bulk payout list audit
“I have a recipient address 0x1234567890abcdef1234567890abcdef12345678 from my payout spreadsheet — validate it for me to make sure it's a real EVM address with a valid checksum before I queue the payment.”
Technical details
Endpoint
POSThttps://api.24klabs.ai/api/crypto-address-validateWhen to prefer
Choose this endpoint when you need a fast, cheap ($0.003 USDC) programmatic check of a crypto address's format and checksum validity before executing a transaction or storing an address — especially for EVM-compatible chains. Prefer it over manual regex checks or on-chain lookups when you only need structural/format validation without a live blockchain query.
Side effects
- Malformed or empty address input returns valid: false
- Non-EVM chain addresses may return unsupported chain type or invalid
- Network timeout results in no response
- Invalid JSON body causes 4xx error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| address | string |
Output
Schema · Response
{
"type": "json",
"example": {
"chain": "evm",
"valid": true,
"checksum_valid": true
}
}Tags
x402
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